<template>
  <div class="wrapper" ref="wrapper">
    <div class="content">
      <slot></slot>
    </div>
  </div>
</template>

<script>
import BScroll from 'better-scroll';
export default {
  props:{
    probeType:{
      type:Number,
      default:0
    },
    pullUpLoad:{
      type:Boolean,
      default:false
    }
  },
  data(){
    return {
      scroll:null
    }
  },
  mounted(){
    // 1.创建BScroll对象
    this.scroll = new BScroll(this.$refs.wrapper, {
      click: true,
      probeType: this.probeType,
      pullUpLoad:this.pullUpLoad
    })

    //2. 监听滚动的位置 
    if(this.probeType === 2 || this.probeType === 3){
      this.scroll.on('scroll', (position) => {
        // console.log(position);
        this.$emit('scroll', position)
      })
    }

    // 3.监听scroll滚动到底部
    if(this.pullUpLoad){
      this.scroll.on('pullingUp',() => {
        this.$emit('pullingUp')
      })
    }
  },
  methods:{
    scrollTo(x, y, time=300) {
      this.scroll && this.scroll.scrollTo(x, y, time)
    },
    refresh(){
      this.scroll && this.scroll.refresh()
    },
    finishPullUp(){
      this.scroll && this.scroll.finishPullUp()
    },
    getScrollY(){
      return this.scroll ? this.scroll.y : 0
    }
  }
}
</script>

<style>

</style>